These two ideas would do more immersive work with water
Water faucets
Connect with water pipes and deposit water to the cauldrons or directly fill a hole
Compatibility Module
Charcoal Filters
The charcoal filters are placed on the top of cauldrons and purify the toxic rain (toxic liquid) of Ecology mod.
With regard to Tough as Nails mod. It would purify the water but not at all, that is to say that if we have filled the thirst bar, we are intoxicated then we should boil the cauldron water to have a pure state and to drink without risk, the water.
If you did not understand the Tough as nails idea, in short we will be able to drink ordinary water but we intoxicated by filling the thirst bar completely. That's why we should boil it.